Help

Amavisd on SQL + per-user quarantine

I'm trying to configure amavisd-new to work with virtual users (in Postfix), and policy of them are stored in Postgres.
I've alrealdy managed to set per-user policy, such as spam-tags, spam-score, etc ...works fine.
But I want to have a per-user quarantine, but i dont want to store spams in postgres, but in dedicated folders for each virtual users.